Raise our Conscience against the Killing of RTI Activists
Wednesday, June 9, 2010
Good Logical Puzzle
Xavier has one of the numbers 1, 2, or 3 in mind. Peter is allowed to ask
one question to Xavier to find out which of these three numbers he has
in mind. Xavier will answer this question only with the answers "yes",
"no", or "I don't know".Which question should Peter ask Xavier to
find out in one time, which number he has in mind?